Vaporizer cup

ABSTRACT

A vaporizer for gas turbine engines formed of three simple parts, a tube, a retaining band and an end cup joined inseparably together to control the passage of the air/fuel mixture through 180* and to vaporize the mixture of contact of the mixture with the forward head plate of the combustion chamber.

United States Patent References Cited Inventor William J. Oliphant [56] l m gg g Mass- UNITED STATES PATENTS gf Julyzs 1969 2,727,358 12/1955 Howes 60/3971 Patented May 4 2,922,279 1/1960 Roberson et a1 60/3971 Assignee The United States of America as represented Primary Examiner-Edward G. Favors by the Secretary of the Navy Attorneys-Edgar J. Brower. and Thomas 0. Watson, Jr.

VAPORIZER CUP 3 cla'msanrawmg ABSTRACT: A vaporizer for gas turbine engines formed of US. Cl 60/39.7l, three simple parts, a tube, a retaining band and an end cup 431/248 joined inseparabiy together to control the passage of the Int. Cl F23d 11/44 air/fuel mixture through 180 and to vaporize the mixture of Field of Search 43 1/248; contact of the mixture with the forward head plate of the com- 60/39.7 1 bustion chamber.

PATENTEU HAY 4l97| v 530 IN VENTOR WILL/AM .1. OL/PHA/VT ATTORNEY VAPORIZER cur STATEMENT OF GOVERNMENT INTEREST The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

BACKGROUND OF THE INVENTION This invention relates to a vaporizer of the type used to in troduce the mixture of air/fuel into the combustion chamber and particularly of the type which guides the pressurized mixture of fluids through an angled path into contact with a vaporizing hot plate.

SUMMARY OF THE INVENTION The invention relates to a simplified vaporizer which comprises only three parts which are brazed together to form a rigid accessory. A tubular section receives the fuel/air mixture. The tubular section terminates in an end cup which turns the mixture 180 to be returned outside of the tubular section and into contact with the hot headplate of the combustion chamber which vaporizes the mixture for combustion in the combustion chamber.

The object of the present invention is to provide a vaporizer which will function under pressure loads in an aft direction, vibratory loads and thermal loads; which will be simple and easy of manufacture; free of slots and holes which could clog or bent tabs which would be subject to breakage. Any projection or part which would cause stress concentration has been eliminated. In like manner parts which are difficult to manufacture or assemble are not present. A structure is formed which has low resistance to air flow and which has good aerodynamic performance.

Other objects, advantages and novel features of the invention will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS FIG. I shows a portion of the headplate of the combustion chamber of a TF34 engine with a plurality of the vaporizers forming the subject of this invention arranged in a circle;

FIG. 2 is a section taken on line 2-2 of FIG. 1; and

FIG. 3 is a section taken on line 3-3 of FIG. 2.

DESCRIPTION OF PREFERRED EMBODIMENT The invention as shown in the drawing is mounted in the headplate ll of the combustion chamber (not shown). As many as desired of these vaporizers may be used, the headplate 11 shown incorporating.

The vaporizer is fonned of a tubular section 12 having its forward end 13 turned to form a flange l4. Mounted on the aft end 15 a retaining band 16 supports an end cup 17 which has a v the end cup l7.

To secure the parts together and to the headplate, the parts are axially loaded with the flange 14 in contact with the headplate ll, the retaining band pressed against a rolled aft end 23 of the tubular section while the forward turned in end 24 of the end cup 17 engages the outer peripheral sections of the retaining band. While axially loaded the vaporizer as a whole is brazed (as shown at 25) to form a rigid fixture.

In operation the fuel/air mixture enters the tubular section at its flanged forward end and passes through the tubular section to the domed end where its direction is reversed through 180 to travel parallel to its entering direction outside of the tube through the passageways 26 formed by the retaining band and into contact with the heated forward headplate ll of the combustion chamber. Here the mixture is vaporized for combustion.

The invention supplies to the art a vaporizer which has only three parts, simple and easy of manufacture which will insure satisfactory performance. This design gives a mechanical retention of the vaporizer in the headplate, a highly desirable feature. The design provides an aerodynamic fuel/air passage which is of low resistance to air flow and eliminates slots, holes and small parts which sometimes interfere with proper func- 30 tion.

Obviously many modifications and variations of the present invention are possible in the light of the above teachings.

I claim:

1. A vaporizer in combination with an engine having a combustion chamber with a headplate comprising:

a tubular section formed with an enlarged flared forward end, said tubular section entering a hole in the headplate, the flared forward end engaging the headplate, the tubu- Iar section extending into the combustion chamber;

a retaining band, formed of alternate inwardly and outwardly extending sections, fixed to the aft inward end of said tubular section; and

a domed end cup in contact with and fixed to the outwardly extending sections of the retaining band, the domed portion of said cup covering the inner end of said tubular section and serving to return the gas mixture flowing through the tubular section to the headplate;

whereby the incoming mixture of air/fuel entering through the tubular section is reversed to a parallel and opposite direction outward of the tubular section to engage the headplate of the combustion chamber.

2. A vaporizer according to claim I and including means for securing the pans together and to the headplate.

3. A vaporizer according to claim 2 wherein the securing means is a brazing operation to form a rigid vaporizer having inseparable parts. 

2. A vaporizer according to claim 1 and including means for securing the parts together and to the headplate.
 3. A vaporizer according to claim 2 wherein the securing means is a brazing operation to form a rigid vaporizer having inseparable parts. 